Definition of concave adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.
Concave lenses focus light inside the curve of the lens, while convex lenses focus light using the outer curve. A lens that curves like a “C” (no flat side) is both concave or convex, depending on which side of the lens you view from.
Concave definition: curved like a segment of the interior of a circle or hollow sphere; hollow and curved.. See examples of CONCAVE used in a sentence.
1. curved or hollowed inward like the inside of a circle or sphere. Compare convex (def. 1). 2. (of a polygon) having at least one interior angle greater than 180°. n. 3. a concave surface, part, line, or thing.
concave (comparative more concave, superlative most concave) Curved like the inner surface of a sphere or bowl. (geometry, not comparable, of a polygon) Not convex; having at least one internal angle greater than 180 degrees.
con•cave ( kon kāv′, kon′ kāv; kon′ kāv), adj., n., v., -caved, -cav•ing. hollow and curved. Cf. convex (def. 1). Mathematics [Geom.](of a polygon) having at least one interior angle greater than 180°. [Obs.]hollow. n. Mathematics a concave surface, part, line, or thing.
Illustrated definition of Concave: Curved inwards. Example: A polygon (which has straight sides) is concave when there are dents or indentations...